I have RaspBerry Pi 3 and I do not want to install Team Viewer on it and found Team Viewer Iot but it does not connect to a computer that has Team Viewer 10. Is there any way to resolve this since I only have the Team Viewer license 10.
As far as I know, TeamViewer version 14 will not connect to a computer running an older version of TeamViewer.
But, you can - even if not recommended - download an older version of TeamViewer and install / run that one.
See here: https://www.teamviewer.com/en/download/previous-versions/ (click on the required version tab and scroll down to the “Linux” section).